Update howto-create-access-control-list-for-nni.md

lower case in headings

Author: sushantjrao

articles/operator-nexus/howto-create-access-control-list-for-nni.md

@@ -9,7 +9,7 @@ ms.date: 04/18/2024
 ms.custom: template-how-to
 ---
 
-# Access Control List (ACL) Management for NNI and layer 3 isolation domain external networks
+# Access Control List (ACL) management for NNI and layer 3 isolation domain external networks
 
 Access Control Lists (ACLs) are a set of rules that regulate inbound and outbound packet flow within a network. Azure's Nexus Network Fabric service offers an API-based mechanism to configure ACLs for network-to-network interconnects and layer 3 isolation domain external networks. This guide outlines the steps to create ACLs.
 
@@ -19,7 +19,7 @@ To create an ACL and define its properties, you can utilize the `az networkfabri
 
  [!INCLUDE [azure-cli-prepare-your-environment.md](~/reusable-content/azure-cli/azure-cli-prepare-your-environment.md)]
 
-1. **Set Subscription (if necessary):**
+1. **Set subscription (if necessary):**
 
  If you have multiple subscriptions and need to set one as the default, you can do so with: